My coworker Diane asked me if I wanted to train for a marathon with her.

Since I am not much of a runner (you try running with D-cup boobs!), I was resistant. Eventually, she convinced me that running is a healthy and exhilarating way to keep in shape. And I do take pride in keeping fit. My workout regimen usually includes some light weight lifting, squats, sit-ups, and the elliptical. My past lovers have all appreciated my physique.

I figured running would add some extra excitement to my life. Instead of exercising indoors, I could take in some fresh air and enjoy the scenery, both nature and guys flexing their muscles. Diane encouraged me to set a strict schedule, adopt a healthy diet, and to wake up at the crack of dawn. I’m not much of a morning person, but she assured me that once I got used to moving my body in the early hours I would crave the sensation. I rolled my eyes, but told her I would give this new routine a try.

To my surprise, within a few weeks I did feel a difference. My entire attitude felt clearer and more positive, and my body was even better than before. Diane was great company, too, keeping pace with me, always pushing my limits.

One morning when Diane and I were stretching outside before our run, my eyes landed on her cleavage. Diane didn’t have large boobs, maybe a B-cup, but her tight shirt really accentuated the perkiness of her breasts. Why hadn’t I ever noticed Diane’s beauty? I guess some women don’t want to recognize another woman’s allure, feeling at risk of finding fault in their own. However, since I don’t have insecurities like that, I could really take in Diane.

“Wow, you’ve got some gorgeous calves,” I complimented Diane.

“Thanks, why don’t you feel them for yourself,” Diane said with a twinkle in her eye. Was she flirting with me? I smirked back. I ran my hand down her toned calf. She felt silky smooth and seemed to enjoy my touch. As though my fingers had a mind of their own, they moved up to her camel toe, drawn like a magnet to Diane’s lady parts. I began to massage the fabric that encased her secret garden.

“Jackie!” Diane gasped, making me flinch. I yanked my hand away.

“I’m so sorry. I’m not sure what came over me,” I said. I couldn’t look her in the eye. I started jogging in place to try to break the awkwardness. I’d never made a move on a woman! What had I just done?

Diane placed her hands on my shoulders, stopping my movements. Then she playfully patted me on my butt. I followed suit and tapped her ass back. We giggled, lightening the mood. Then it was Diane’s turn to surprise me. She leaned in closer and reached for my boobs. I didn’t stop her when she cupped and caressed them. Then, to my amazement, Jackie pulled my shirt over my head, leaving me standing outside on a quiet running trail with my industrial-strength sports bra on.

I was too nervous to continue outside, and asked Diane to come back to my apartment. She readily agreed.

As I drove home, I worried that the moment had passed, and the exploration I was so excited about wouldn’t happen. But Diane pulled in behind me, and I knew from the smile she gave me as she walked up that we were going to have no problem getting back in the groove.

Once we were inside, I unhooked my bra, totally aroused, but still not really sure what was about to unfold. All I knew was that I was at the point of no return.

Too horny to think straight, I watched Diane take hold of one of my breasts and lick her way up to my stiff nipple. The sensual suckling made my tender pussy ache and my panties wet. While she pleased and teased my nips, I fondled her tits, discovering she was now sans bra. What a great set of boobs.

The heat turned up even more when Diane pushed aside my running shorts and sticky panties to slip her fingers inside me. I moaned as she finger-fucked me, reaching my climax in no time once she found my magic button.

Diane still had me under her spell when she led me to the nearby couch. She removed her running sneakers, workout pants, and silky panties, lay down, and arched her pelvis toward my face. Even though her fingers had just gotten me off, I wasn’t sure if I should dive in.

“Eat my pussy,” she begged. Well, I did owe her one, plus she looked gorgeous sprawled out waiting for me. I eased myself toward her engorged bud. My tongue circled her pussy lips, then I became a little braver. Her sweet nectar was intoxicating. I flicked her clit, and I must have been doing something right because she kept grinding her mound on my face. I was drenched with her juices, and Diane’s entire body trembled and shook when she got to her breaking point.

After we cooled off we went for our morning run, our steamy scene running through my head all the while. I couldn’t wait to get Diane back to my shower.